Supporting base for portable electronic device



FIG. 1 is a front elevational of a supporting base for portable electronic device showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front, top, right perspective view thereof;

FIG. 8 is a front, top, left perspective view thereof; and,

FIG. 9 is a rear, bottom, left perspective view thereof.

Portions in broken lines are for illustrative purposes only and form no part of claimed design. 

The ornamental design for a supporting base for portable electronic device, as shown and described. 